I am trying to find the proper command to releaese and renew my ip address similar to ipconfig /release and ipconfig /renew in Windows.

I tried ifconfig eth1 down and ifconfig eth1 up

This brings the interface down then up, but it did not seem to pull a dhcp config properly. When it came back up I could not access resources.

dhcpcd -k eth? should release
dhcpcd -n eth? should renew

I just use dhcpcd eth0 and it always works..

When I use this command I get:

Internet Software Consortium DHCP Server V3.0pl2
Copyright 1995-2003 Internet Software Consortium.
All rights reserved.
For info, please visit http://www.isc.org/products/DHCP
Wrote 5 leases to leases file.

No subnet declaration for eth1 (My Public IP).
** Ignoring requests on eth1. If this is not what
you want, please write a subnet declaration
in your dhcpd.conf file for the network segment
to which interface eth1 is attached. **


Not configured to listen on any interfaces!

If you did not get this software from ftp.isc.org, please
get the latest from ftp.isc.org and install that before
requesting help.

If you did get this software from ftp.isc.org and have not
yet read the README, please read it before requesting help.
If you intend to request help from the dhcp-server@isc.org
mailing list, please read the section on the README about
submitting bug reports and requests for help.

Please do not under any circumstances send requests for
help directly to the authors of this software - please
send them to the appropriate mailing list as described in
the README file.

exiting.

Wait a minute. I screwed up the command. This time I typed it correctly and it worked exactly how I wanted.

dhcpcd eth1 -k
dhcpcd eth1 -n

Thanks